MANILA P.I.

Looks like a precancel stamp of the type used in the United States, but it's actually a comprint used by the Rambler Shoe Company and the Howard Lux Company.

Heacock's comprint

This one is a comprint of H. E. Heacock Company of Manila.

PNB comprint

The circular commercial overprint (which I shortened to comprint) of the Philippine National Bank on two of the USPI series of definitives.